作者:Shun Sakurai、Tetsuya Inagaki、Takuya Kodama、Masahiro Yamanaka、Mamoru Tobisu
DOI:10.1021/jacs.1c11497
日期:2022.1.26
Currently, catalytically transferable carbenes are limited to electron-deficient and neutral derivatives, and electron-rich carbenes bearing an alkoxy group (i.e., Fischer-type carbenes) cannot be used in catalytic cyclopropanation because of the lack of appropriate carbene precursors. We report herein that acylsilanes can serve as a source of electron-rich carbenes under palladium catalysis, enabling
目前,可催化转移的卡宾仅限于缺电子和中性衍生物,而带有烷氧基的富电子卡宾(即Fischer型卡宾)由于缺乏合适的卡宾前体而不能用于催化环丙烷化。我们在此报道,在钯催化下,酰基硅烷可以作为富电子卡宾的来源,从而实现一系列烯烃的环丙烷化。这种反应性特征与不含金属的硅氧卡宾形成鲜明对比,后者对正常烯烃不具有反应性。所得的甲硅烷氧基环丙烷可用作有价值的均烯醇化物等价物,可以快速获得精细的 β-官能化酮。